Fly catchers are animals or objects used to catch flies. Screens, frogs, MITTS, webs, fielders, toads, and swatters are all examples of fly catchers. Screens are typically used to cover windows or doors to keep flies out. Frogs are amphibians that eat flies as part of their diet. MITTS are a type of glove with a sticky surface that can be used to catch flies. Webs are made by spiders to trap their prey, which often includes flies. Fielders are people who play the game of baseball and use their hands to catch fly balls. Toads are amphibians that also eat flies. Swatters are handheld devices used to swat at and kill flies.